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Sep 29th, 2018
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  1. //shops
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4. multiset<int> s;
  5. int main()
  6. {
  7. int t;
  8. cin>>t;
  9. while(t--)
  10. {
  11. s.clear();
  12. int n,k;
  13. cin>>n>>k;
  14. for (int i=0;i<n;i++)
  15. {
  16. int a[3];
  17. cin>>a[0]>>a[1]>>a[2];
  18. sort(a,a+3);
  19. s.insert(a[0]);
  20. s.insert(a[1]);
  21. }
  22. int ret=0;
  23. while(k--)
  24. {
  25. ret+=*s.begin();
  26. s.erase(s.begin());
  27. }
  28. cout<<ret<<endl;
  29. }
  30. }
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